FreeBSD/Linux Kernel Cross Reference
sys/netccitt/hd_var.h

     /*      $NetBSD: hd_var.h,v 1.11 2003/08/07 16:33:01 agc Exp $  */
     
     /*
      * Copyright (c) 1990, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * the Laboratory for Computation Vision and the Computer Science Department
      * of the University of British Columbia.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)hd_var.h    8.1 (Berkeley) 6/10/93
     */
    
    /*
     * Copyright (c) 1984 University of British Columbia.
     *
     * This code is derived from software contributed to Berkeley by
     * the Laboratory for Computation Vision and the Computer Science Department
     * of the University of British Columbia.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)hd_var.h    8.1 (Berkeley) 6/10/93
     */
    
    /*
     *
     * hdlc control block
     *
     */
    
    struct  hdtxq {
            struct  mbuf *head;
            struct  mbuf *tail;
    };
    
    struct  hdcb {
            struct  hdcb *hd_next;  /* pointer to next hdlc control block */
            char    hd_state;       /* link state */
            char    hd_vs;          /* send state variable */
            char    hd_vr;          /* receive state variable */
            char    hd_lastrxnr;    /* last received N(R) */
            char    hd_lasttxnr;    /* last transmitted N(R) */
            char    hd_condition;
    #define TIMER_RECOVERY_CONDITION        0x01
    #define REJ_CONDITION                   0x02
    #define REMOTE_RNR_CONDITION            0X04
            char    hd_retxcnt;
            char    hd_xx;
           struct  hdtxq hd_txq;
           struct  mbuf *hd_retxq[MODULUS];
           char    hd_retxqi;
           char    hd_rrtimer;
           char    hd_timer;
   #define SET_TIMER(hdp)          hdp->hd_timer = hd_t1
   #define KILL_TIMER(hdp)         hdp->hd_timer = 0
           char    hd_dontcopy;    /* if-driver doesn't free I-frames */
           struct  ifnet *hd_ifp;  /* device's network visible interface */
           struct  ifaddr *hd_ifa; /* device's X.25 network address */
           struct  x25config *hd_xcp;
           caddr_t hd_pkp;         /* Level III junk */
           int     (*hd_output)    /* separate entry for HDLC direct output */
                           __P((struct mbuf *, ...));
   
           /* link statistics */
   
           long    hd_iframes_in;
           long    hd_iframes_out;
           long    hd_rrs_in;
           long    hd_rrs_out;
           short   hd_rejs_in;
           short   hd_rejs_out;
           long    hd_window_condition;
           short   hd_invalid_ns;
           short   hd_invalid_nr;
           short   hd_timeouts;
           short   hd_resets;
           short   hd_unknown;
           short   hd_frmrs_in;
           short   hd_frmrs_out;
           short   hd_rnrs_in;
           short   hd_rnrs_out;
   };
   
   #ifdef _KERNEL
   extern struct   hdcb *hdcbhead;         /* head of linked list of hdcb's */
   extern struct   Frmr_frame hd_frmr;     /* rejected frame diagnostic info */
   extern struct   ifqueue hdintrq;        /* hdlc packet input queue */
   struct  Hdlc_frame;
   struct  Hdlc_iframe;
   struct  Hdlc_sframe;
   
   extern int      hd_t1;                  /* timer T1 value */
   extern int      hd_t3;                  /* RR send timer */
   extern int      hd_n2;                  /* frame retransmission limit */
   
   
   /* hd_debug.c */
   void hd_trace __P((struct hdcb *, int , struct mbuf *));
   int hd_dumptrace __P((struct hdcb *));
   
   /* hd_input.c */
   void hdintr __P((void));
   int process_rxframe __P((struct hdcb *, struct mbuf *));
   int process_iframe __P((struct hdcb *, struct mbuf *, struct Hdlc_iframe *));
   bool range_check __P((int, int , int ));
   void process_sframe __P((struct hdcb *, struct Hdlc_sframe *, int));
   bool valid_nr __P((struct hdcb *, int , int));
   
   /* hd_output.c */
   int hd_output __P((struct mbuf *, ...));
   void hd_start __P((struct hdcb *));
   void hd_send_iframe __P((struct hdcb *, struct mbuf *, int));
   int hd_ifoutput __P((struct mbuf *, ...));
   void hd_resend_iframe __P((struct hdcb *));
   
   /* hd_subr.c */
   void hd_init __P((void));
   void *hd_ctlinput __P((int , struct sockaddr *, void *));
   void hd_initvars __P((struct hdcb *));
   int hd_decode __P((struct hdcb *, struct Hdlc_frame *));
   void hd_writeinternal __P((struct hdcb *, int, int ));
   void hd_append __P((struct hdtxq *, struct mbuf *));
   void hd_flush __P((struct ifnet *));
   void hd_message __P((struct hdcb *, char *));
   int hd_status __P((struct hdcb *));
   struct mbuf *hd_remove __P((struct hdtxq *));
   
   /* hd_timer.c */
   void hd_timer __P((void));
   
   #endif

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